I have what I believe is an unused RA60 head #4. At least the surface looks very clean. Someone has written "RA60 04" on the side of the box. On the top there is handwritten 70-18661-04. https://i.imgur.com/RNK0FOTl.jpg I could use a RL02 or RL01 head as a trade if someone is interested. /Mattis